A 5Gb/s/pin 16Gb LPDDR4/4X Reconfigurable SDRAM with Voltage-High Keeper and a Prediction-based Fast-tracking ZQ Calibration. - Jin-Seok Heo; Kihan Kim; Dong-Hoon Lee; Chang-Kyo Lee; Daesik Moon; Kiho Kim; Jin-Hyeok Baek; Sung-Woo Yoon; Hui-Kap Yang; Kyungryun Kim; Youngjae Kim; Bokgue Park; et al. (VLSI Circuits, 2019)